Entreprise française de cybersécurité depuis 2004
☎ 03 60 47 09 81 - info@securiteinfo.com
☎ 03 60 47 09 81 - info@securiteinfo.com
In the Linux kernel, the following vulnerability has been resolved:char: tpm: Protect tpm_pm_suspend with locksCurrently tpm transactions are executed unconditionally intpm_pm_suspend() function, which may lead to races with other tpmaccessors in the system.Specifically, the hw_random tpm driver makes use of tpm_get_random(),and this function is called in a loop from a kthread, which means it'snot frozen alongside userspace, and so can race with the work doneduring system suspend: tpm tpm0: tpm_transmit: tpm_recv: error -52 tpm tpm0: invalid TPM_STS.x 0xff, dumping stack for forensics CPU: 0 PID: 1 Comm: init Not tainted 6.1.0-rc5+ #135 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.0-20220807_005459-localhost 04/01/2014 Call Trace: tpm_tis_status.cold+0x19/0x20 tpm_transmit+0x13b/0x390 tpm_transmit_cmd+0x20/0x80 tpm1_pm_suspend+0xa6/0x110 tpm_pm_suspend+0x53/0x80 __pnp_bus_suspend+0x35/0xe0 __device_suspend+0x10f/0x350Fix this by calling tpm_try_get_ops(), which itself is a wrapper aroundtpm_chip_start(), but takes the appropriate mutex.[Jason: reworked commit message, added metadata]
No PoCs from references.
- https://github.com/ARPSyndicate/cve-scores